Insulator construction



Oct. 27, 1925.

J. M. PECK INS'ULATOR CONSTRUCTION Filed Jan. 8. 1923 f, A TTORNEY Patented Oct. 27, 1925.

UNITED STATES 1,558,499 PATENT OFFICE.

JOHN M. PECK, OF LIMA, NEW YORK, ASSIGNOR TO THE PORCELAIN INSULATOB GOR- PORATION, OF LIMA. NEW YORK, A CORPORATION OF NEW YORK.

INSULATOR CONSTRUCTION.

Application filed January 8, 1923.

To all whom it may concern:

Be it known that I, JOHN M. PECK, a citizen of the United States of America, residing at Lima, in the county of Livingston and State of New York, have invented certain new and useful Improvements in Insulator Construction, of which the following is a specification.

My invention relates to an insulator construction of the general type embodying a plurality of sections of porcelain or similar material nested one within the other and secured together by cement, and it has for its purpose to provide an insulator of such form and construction as to impart maximum strength and durability thereto.

Another purpose of the invention is to afford an arrangement such that the body of the insulator or the sections thereof will not be weakened or fractured by expansion and contraction of cement at the joints where attachment takes place between the sections.

A further purpose of the invention is to provide an insulator that can be readily manufactured at a low cost, and will successfully withstand the temperature changes to which it is subjected,

To these ends, the invention comprises the structure that will appear clearly from the following description when read in conjunction with the accom anying drawing, the novel characteristics eing pointed out in the claims following the specification.

The drawing is a sectional view of an in sulator constructed in accordance with a preferred embodiment of the invention.

The invention as illustrated in the exemplary embodiment includes an upper section 1 and a lower section 2, although the principle of my improvement may be also applied to insualtors having more than two sections.

The lower section 2 has a rounded end or head 3 which fits into a correspondingly rounded recess or pocket 4 in the upper insulator, said rounded end 3 and rounded recess 4 constituting positioning surfaces which enable the one section to be readily placed in the other section and centrally positioned in proper relation thereto.

When positioning the sections together, it is usual to place a small amount of liquid resilient cement in the one section before in sorting the other 50 that there will be a thin Serial No. 611,314.

film of such liquid cement between the positioning surfaces, to take up any irregulnrities in such surfaces and force out all the air. The cement between the positioning surfaces is of such a resilientnature as to undergo expansion and contraction changes without fracturing or affecting the porcelain sections in any way.

The sections 1 and 2 are held together by a body of nonresilient or rigid cement 5 located between the spaced vertical side walls or attaching surfaces 6 and 7, said body of cement 5 being inserted through the opening 8 af orded between the bottom of the upper section 1 and the adjacent: surface of the lower section 2, after the SOC tions are nested.

If there is a rigid cement between the rounded or curved surfaces 3 and 41-, frac ture of the. insulator is likely to occur at such points, and therefore it is highly important to prevent the non-resilient cement 5 flowing beyond the vertical surfaces 6 and 7, or reaching the rounded positioning surfaces of the sections, and to accomplish this. I provide a sealing member, preferably in the form of a resilient gasket of rubber composition or suitable material, interposed between the sections in such amanner as to form a mechanical barrier between the resilient cement space afforded by the opposed positioning surfaces and the non-resilient cement space afforded by the vertical at taching surfaces.

Preferably this is effected by forming opposed shoulders on the insulator sections at the bottom of the positioning surfaces 3 and i, said shoulders being preferably located in a horizontal plane. A resilient gasket 9 is arranged between said shoulders and is rigidly held between the opposed surfaces of the sections, preventing the non-resilient cement 5 reaching the space between the positioning surfaces 3 and 4:.

In assembling the sections, the upper section is first inverted and a small amount of resilient cement inserted. The gasket 9 is then positioned on the shoulder of the inverted upper section, after which the lower section is inserted in inverted position. Following this, the non-resilient cement is in serted through the opening 8 by a pressure gun or other suitable means and fills the space as far as the gasket 9, but the latter effectually prevents the non-resilient cement rounded top fitting a getting past the opposed shoulders, and reaching the space between the positioning surfaces.

My invention is not limited to the precise structure shown, but may be modified without departing from the'essential idea of a mechanical barrier such as a resilient gasket separating the inner or positioning surfaces of the sections from the outer or attaching surfaces, and this application is intended to cover any changes coming within the spirit of my improvement or the scope of the following claims.

I claim:

1. An insulator comprising a plurality of nested sections of insulating material having cooperating positioning surfaces and cooperating attaching surfaces, opposed shoulders located between the attaching and the position' surfaces, a resilient cement arranged between the positioning surfaces, a rigid cement arranged between the attaching surfaces, and a sealing gasket of resilient material arranged between said opposed shoulders and acting to prevent access of the rigid cement beyond the attaching surfaces.

2. An insulator comprising a plurality of nested sections, the lower section having a correspondingly rounded recess in the upper section, a resilient cement between said rounded surfaces, the rounded surfaces terminating in opposed shoulders, a as slim material mamabatmi iaia shoulders and acting to prevent access of rigid U cement beyond thesame, the opposed side walls of the sections constituting attaching surfaces, and rigid cement located between said side walls and outside said resilient gasket.

3. An insulator comprising a plurality of nested sections of insulating material having cooperating positioning surfaces and coo er! ating attaching surfaces, rigid cement ialirri? posed between the attaching surfaces, msifi:

ent cement interposed between the positioni ing surfaces, and a sealing device tween the resilientsnd-the rigid cement.

4. An insulator comprising a plurality a!" i nested sections of insulating material, the

tween said shoulders and acting to prevent d access of the rigid cement between sai rounded surfaces.

In witness whereof, I have hereunto signed my name.

JOHN M. PEcK;

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